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	/*
	* Copyright (c) 1998, 2011, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	package com.sun.tools.jdi;

	import com.sun.jdi.*;

	import java.util.*;

	final public class ClassTypeImpl extends InvokableTypeImpl
	implements ClassType
	{
	private static class IResult implements InvocationResult {
	final private JDWP.ClassType.InvokeMethod rslt;

	public IResult(JDWP.ClassType.InvokeMethod rslt) {
	this.rslt = rslt;
	}

	@Override
	public ObjectReferenceImpl getException() {
	return rslt.exception;
	}

	@Override
	public ValueImpl getResult() {
	return rslt.returnValue;
	}
	}

	private boolean cachedSuperclass = false;
	private ClassType superclass = null;
	private int lastLine = -1;
	private List<InterfaceType> interfaces = null;

	protected ClassTypeImpl(VirtualMachine aVm,long aRef) {
	super(aVm, aRef);
	}

	public ClassType superclass() {
	if(!cachedSuperclass) {
	ClassTypeImpl sup = null;
	try {
	sup = JDWP.ClassType.Superclass.
	process(vm, this).superclass;
	} catch (JDWPException exc) {
	throw exc.toJDIException();
	}

	/*
	* If there is a superclass, cache its
	* ClassType here. Otherwise,
	* leave the cache reference null.
	*/
	if (sup != null) {
	superclass = sup;
	}
	cachedSuperclass = true;
	}

	return superclass;
	}

	@Override
	public List<InterfaceType> interfaces() {
	if (interfaces == null) {
	interfaces = getInterfaces();
	}
	return interfaces;
	}

	@Override
	public List<InterfaceType> allInterfaces() {
	return getAllInterfaces();
	}

	public List<ClassType> subclasses() {
	List<ClassType> subs = new ArrayList<ClassType>();
	for (ReferenceType refType : vm.allClasses()) {
	if (refType instanceof ClassType) {
	ClassType clazz = (ClassType)refType;
	ClassType superclass = clazz.superclass();
	if ((superclass != null) && superclass.equals(this)) {
	subs.add((ClassType)refType);
	}
	}
	}

	return subs;
	}

	public boolean isEnum() {
	ClassType superclass = superclass();
	if (superclass != null &&
	superclass.name().equals("java.lang.Enum")) {
	return true;
	}
	return false;
	}

	public void setValue(Field field, Value value)
	throws InvalidTypeException, ClassNotLoadedException {

	validateMirror(field);
	validateMirrorOrNull(value);
	validateFieldSet(field);

	// More validation specific to setting from a ClassType
	if(!field.isStatic()) {
	throw new IllegalArgumentException(
	"Must set non-static field through an instance");
	}

	try {
	JDWP.ClassType.SetValues.FieldValue[] values =
	new JDWP.ClassType.SetValues.FieldValue[1];
	values[0] = new JDWP.ClassType.SetValues.FieldValue(
	((FieldImpl)field).ref(),
	// validate and convert if necessary
	ValueImpl.prepareForAssignment(value, (FieldImpl)field));

	try {
	JDWP.ClassType.SetValues.process(vm, this, values);
	} catch (JDWPException exc) {
	throw exc.toJDIException();
	}
	} catch (ClassNotLoadedException e) {
	/*
	* Since we got this exception,
	* the field type must be a reference type. The value
	* we're trying to set is null, but if the field's
	* class has not yet been loaded through the enclosing
	* class loader, then setting to null is essentially a
	* no-op, and we should allow it without an exception.
	*/
	if (value != null) {
	throw e;
	}
	}
	}

	PacketStream sendNewInstanceCommand(final ThreadReferenceImpl thread,
	final MethodImpl method,
	final ValueImpl[] args,
	final int options) {
	CommandSender sender =
	new CommandSender() {
	public PacketStream send() {
	return JDWP.ClassType.NewInstance.enqueueCommand(
	vm, ClassTypeImpl.this, thread,
	method.ref(), args, options);
	}
	};

	PacketStream stream;
	if ((options & INVOKE_SINGLE_THREADED) != 0) {
	stream = thread.sendResumingCommand(sender);
	} else {
	stream = vm.sendResumingCommand(sender);
	}
	return stream;
	}

	public ObjectReference newInstance(ThreadReference threadIntf,
	Method methodIntf,
	List<? extends Value> origArguments,
	int options)
	throws InvalidTypeException,
	ClassNotLoadedException,
	IncompatibleThreadStateException,
	InvocationException {
	validateMirror(threadIntf);
	validateMirror(methodIntf);
	validateMirrorsOrNulls(origArguments);

	MethodImpl method = (MethodImpl)methodIntf;
	ThreadReferenceImpl thread = (ThreadReferenceImpl)threadIntf;

	validateConstructorInvocation(method);

	List<Value> arguments = method.validateAndPrepareArgumentsForInvoke(
	origArguments);
	ValueImpl[] args = arguments.toArray(new ValueImpl[0]);
	JDWP.ClassType.NewInstance ret = null;
	try {
	PacketStream stream =
	sendNewInstanceCommand(thread, method, args, options);
	ret = JDWP.ClassType.NewInstance.waitForReply(vm, stream);
	} catch (JDWPException exc) {
	if (exc.errorCode() == JDWP.Error.INVALID_THREAD) {
	throw new IncompatibleThreadStateException();
	} else {
	throw exc.toJDIException();
	}
	}

	/*
	* There is an implict VM-wide suspend at the conclusion
	* of a normal (non-single-threaded) method invoke
	*/
	if ((options & INVOKE_SINGLE_THREADED) == 0) {
	vm.notifySuspend();
	}

	if (ret.exception != null) {
	throw new InvocationException(ret.exception);
	} else {
	return ret.newObject;
	}
	}

	public Method concreteMethodByName(String name, String signature) {
	Method method = null;
	for (Method candidate : visibleMethods()) {
	if (candidate.name().equals(name) &&
	candidate.signature().equals(signature) &&
	!candidate.isAbstract()) {

	method = candidate;
	break;
	}
	}
	return method;
	}

	void validateConstructorInvocation(Method method)
	throws InvalidTypeException,
	InvocationException {
	/*
	* Method must be in this class.
	*/
	ReferenceTypeImpl declType = (ReferenceTypeImpl)method.declaringType();
	if (!declType.equals(this)) {
	throw new IllegalArgumentException("Invalid constructor");
	}

	/*
	* Method must be a constructor
	*/
	if (!method.isConstructor()) {
	throw new IllegalArgumentException("Cannot create instance with non-constructor");
	}
	}


	public String toString() {
	return "class " + name() + " (" + loaderString() + ")";
	}

	@Override
	CommandSender getInvokeMethodSender(ThreadReferenceImpl thread,
	MethodImpl method,
	ValueImpl[] args,
	int options) {
	return () ->
	JDWP.ClassType.InvokeMethod.enqueueCommand(vm,
	ClassTypeImpl.this,
	thread,
	method.ref(),
	args,
	options);
	}

	@Override
	InvocationResult waitForReply(PacketStream stream) throws JDWPException {
	return new IResult(JDWP.ClassType.InvokeMethod.waitForReply(vm, stream));
	}

	@Override
	boolean canInvoke(Method method) {
	// Method must be in this class or a superclass.
	return ((ReferenceTypeImpl)method.declaringType()).isAssignableFrom(this);
	}
	}

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